Definitions Found:
naturally occurring radioactive isotope of thorium. Symbol: Io; at. no.: 90; at. wt.: 230
- ioniumnaturally occurring radioactive isotope of thorium. Symbol: Io; at. no.: 90; at. wt.: 230
- ioniumsnaturally occurring radioactive isotope of thorium. Symbol: Io; at. no.: 90; at. wt.: 230
- thoronradioactive isotope of radon, produced by the disintegration of thorium. Symbol: Tn; at. wt.: 220; at. no.: 86
- thoronsradioactive isotope of radon, produced by the disintegration of thorium. Symbol: Tn; at. wt.: 220; at. no.: 86
- boronnonmetallic element occurring naturally only in combination, as in borax or boric acid, and obtained in either an amorphous or a crystalline form when reduced from its compounds. Symbol: B; at. wt.: 10.811; at. no.: 5
- boronicnonmetallic element occurring naturally only in combination, as in borax or boric acid, and obtained in either an amorphous or a crystalline form when reduced from its compounds. Symbol: B; at. wt.: 10.811; at. no.: 5
- boronsnonmetallic element occurring naturally only in combination, as in borax or boric acid, and obtained in either an amorphous or a crystalline form when reduced from its compounds. Symbol: B; at. wt.: 10.811; at. no.: 5